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M. A. SPINK.

PLOW GOLTBR. No. 256,250 Patented Apr.11,1882.

g i E a! Z 3 4 w WITNESSES; Y 7 INVENTOR ATTORNEY PATENT OFFICE.

MORRIS A. SPINK, OF GROWN POINT, INDIANA, ASSIGNOR OF ONE-HALF TO JACOB A. WEIS,

OF SAME PLACE.

PLOW-COLTER.

SPECIFICATION forming part of Letters Patent No. 256,250, dated April 11, 1882. Application filed January 3, 1882. (Model.)

10 all whom itmay concern Be it known that I, Moems A. SPINK, a citizen of the United States, residing at Crown Point, in the county of Lake and State of Indiana, have invented a new and useful Improvement upon my original Stubble-Oolter patented July 18, 1865.

I will first describe my improvement as shown in the accompanying drawing, the per pendicular dotted lines representing the shank of my original invention.

My improvement consists of curving the shank of the colter forward from the perpendicular dotted lines to a point on the plowbeam nearly vertical above the blade of the colter, then bending the upper end ofthe shank backward at B to nearly a right angle with thelower part, A. Several notches are formed in the front edge of the shank at O.

The advantages of my improvement are as follows:

By curvingthe shank of the colter forward from a perpendicular position, causing it to slant backward and downward from the hearing on the plowbeam, the loose trash--such as dry straw and cornstalks-is forced downward by the forward movement of the plow, where it comes in contact with the heavy trash passing over the wing of the colter, and is thrown off more readily and perfectly.

Second, by curving the shank, as at A, forward, as stated, partially crossing the plowbeam diagonally t0 the point B, and then turning it backward at nearly right angles, 1 get a wider bearing on the plow-beam, so that with the same size iron and a common clamp the colter will resist a greater side strain, and is held more firmly in position.

of the shank above the plow-beam at O are to rest against the bolt in the clamp above the plow-beam to prevent the colter from drawing downward by any heavy draft or pressure coming against the front edge of the colter, and to allow the colter to be adjusted as=de sired.

What I claim as my invention, and desire to secure by Letters Patent, is-

The sickle-shaped colter formed with the curved standard A, the cutting-blade at, having its upper end curved to the landside, and the notched shank O, substantially as shown and described.

Witnesses: MORRIS A. SPIN K.

DANIEL WEIS, EDWIN F. GASWELL.

Third, the several notches in the front edge 

